Twomaples Adult Bike Helmet CPSC Certificated Bicycle Helmet with Lightweight Safety Protection Size Adjustable Bike Helmet for Men and Women

Ventilation and Double-layer Protection Complies with US CPSC Full Coverage EPS Material Adjustable Rotational Dial Removable Sun Visor Washable Liner Size: Fits Head Circumferences 21.3''-24.4'' Premium Material Nice combination of Durable PC Shell and EPS Foam to absorb shock uniformly and protect the rider's head during impact. Excellent Ventilation Well-placed vents offers ample breathability. Great ventilation and aerodynamic to ensure High-end Comfort, Cool without creating excessive drag. Easy to Adjust The micro-adjust dial offers a huge adjustment range.Twist the rotational dial and adjust chin strap to get an Exact Fit. Sporty & Stylish Twomaples Helmet is sleek, compact, light and has 18 large air vents for excellent fit and nice breathability, and there are multiple colors to choose from.